CN210571808U - Internal combustion engine piston ring-cylinder liner friction and wear performance test platform - Google Patents
Internal combustion engine piston ring-cylinder liner friction and wear performance test platform Download PDFInfo
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- CN210571808U CN210571808U CN201920376140.7U CN201920376140U CN210571808U CN 210571808 U CN210571808 U CN 210571808U CN 201920376140 U CN201920376140 U CN 201920376140U CN 210571808 U CN210571808 U CN 210571808U
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Abstract
The utility model belongs to the technical field of the internal-combustion engine test to a friction and wear performance test platform of internal-combustion engine piston ring-cylinder liner is disclosed. The main body of the test bed in the platform is an engine element, and a piston ring and a piston are installed in a cylinder sleeve in a matching way to form a piston ring-cylinder sleeve friction pair; the test bed base is used for mounting and supporting the test bed main body; the transmission control system provides power for the reciprocating motion of the piston through a crank connecting rod mechanism; the pneumatic loading system is used for controlling the pressure and the temperature of gas in the cylinder; the temperature control system is used for adjusting the wall temperature of the cylinder sleeve and keeping the wall temperature constant; the lubricating oil supply system supplies lubricating oil to the test board friction pair; the film thickness measuring system is used for testing the thickness of an oil film between the piston ring and the cylinder sleeve; the data acquisition system is used for measuring the rotating speed, the temperature and the pressure of the test bed. The utility model discloses working environment in the jar can simulate under the circumstances of not lighting a fire, carries out piston ring-cylinder liner friction performance test, has higher operating mode reduction degree, and easy operation, experimental cost are low, and test data is reliable and stable.
Description
Technical Field
The utility model belongs to the technical field of the internal-combustion engine test, more specifically relates to an internal-combustion engine piston ring-cylinder liner friction and wear performance test platform.
Background
Internal combustion engines are the most important power plants in today's society. Since the mid-19 th century, the device has been widely applied to various social industries such as transportation, agricultural machinery, engineering machinery, power generation and the like through development of more than a century. With global energy and environmental issues being gradually emphasized by the world, energy saving and emission reduction technologies in internal combustion engines are receiving more and more attention.
The internal combustion engine has a complex structure, and various forms of moving friction pairs exist in the system. The piston ring-cylinder sleeve is the most important and critical friction pair in the internal combustion engine, and the working reliability of the piston ring-cylinder sleeve directly influences the performance and the service life of the whole internal combustion engine. In the working process of the internal combustion engine, a piston ring in a cylinder is in the operating environment of high temperature, high speed, high load, chemical corrosion and the like, and the working condition is extremely severe, so that the lubricating property of the piston ring is poor. Research shows that the friction loss in the energy consumption of the internal combustion engine accounts for up to 48 percent. Wherein, the friction power consumption among the piston, the piston ring and the cylinder sleeve accounts for about 65 percent of the total friction power consumption. Therefore, the improvement of the friction and wear performance of the piston ring and the cylinder sleeve of the internal combustion engine has very important significance for improving the efficiency of the internal combustion engine, reducing the friction loss and prolonging the service life.
At present, the friction and wear performance test method of the piston ring-cylinder sleeve of the internal combustion engine mainly comprises a sample test method and a real machine test method. The test method of the sample intercepts the piston ring and cylinder sleeve samples, and simplifies the friction motion of the piston ring and the cylinder sleeve in the cylinder into simple reciprocating friction among the samples, and the reaction to the actual working condition is lacked; the real machine test method can directly carry out ignition test on the internal combustion engine, can obtain test data under the real working condition, but has the disadvantages of difficult test, complex operation, high test cost and longer period.
SUMMERY OF THE UTILITY MODEL
To the above defect or improvement demand of prior art, the utility model provides an internal-combustion engine piston ring-cylinder liner friction and wear performance test platform has wherein built the test bench main part through cylinder liner, piston ring, piston and crank connecting rod structure to simulate internal-combustion engine actual operating mode through a plurality of control system. Correspondingly, the problem that the friction and wear performance test process of the piston ring and the cylinder sleeve cannot reflect real working conditions or is complicated to operate can be effectively solved.
In order to achieve the above object, the utility model provides an internal-combustion engine piston ring-cylinder liner friction and wear performance test platform, this platform include test bench main part, test bench base, transmission control system, pneumatic loading system, temperature control system, lubricated oil feeding system, thick measurement system and data acquisition system, wherein:
the test bed main body is an engine original and comprises a cylinder sleeve, a piston ring and a crank connecting rod mechanism, wherein the piston ring and the piston are installed in the cylinder sleeve in a matching mode to form a piston ring-cylinder sleeve friction pair, and the crank connecting rod mechanism is connected with the piston to drive the piston and the piston ring to reciprocate;
the test bed base is used for mounting and supporting the test bed main body and simultaneously forms a closed cylinder together with the cylinder sleeve, the piston ring and the piston;
the transmission control system is connected with the crank connecting rod mechanism and provides power for the reciprocating motion of the piston and the piston ring;
the pneumatic loading system is used for controlling the pressure and the temperature of gas in the cylinder, so that the actual working environment is simulated by applying loads to the piston and the piston ring;
the temperature control system is arranged on the outer side of the cylinder sleeve and used for controlling the wall surface temperature of the cylinder sleeve and keeping the wall surface temperature constant;
the lubricating oil supply system is used for lubricating the piston ring-cylinder sleeve friction pair and the crank connecting rod mechanism by spraying lubricating oil;
the film thickness measuring system is arranged on the outer side of the cylinder sleeve, and the thickness of an oil film between the piston ring and the cylinder sleeve is tested by utilizing ultrasonic waves;
the data acquisition system is used for measuring the rotating speed, the temperature and the pressure of the test bed, so that the working data of the piston ring-cylinder sleeve friction pair are obtained.
Preferably, the test bed base comprises a bench base, a machine body support, a fixed clamping groove bottom plate and a fixed clamping groove top plate which are connected in sequence, wherein the fixed clamping groove bottom plate and the fixed clamping groove top plate are connected through a fixing screw rod, and the cylinder sleeve is fixedly installed between the fixed clamping groove bottom plate and the fixed clamping groove top plate.
Preferably, the transmission control system comprises a three-phase asynchronous motor, a coupler, a transmission shaft and a frequency converter, wherein the three-phase asynchronous motor is used as a power source and is connected with the crank-link mechanism through the coupler and the transmission shaft in sequence so as to drive the piston and the piston ring to reciprocate, and the frequency converter is connected with the three-phase asynchronous motor and is used for changing the rotating speed of the three-phase asynchronous motor.
Preferably, the pneumatic loading system comprises an air inlet, an air outlet and an air supply device, the air inlet and the air outlet are respectively arranged on the top plate of the fixing clamping groove, the air supply device comprises a compressed air cylinder, a pressurization module and a heating module which are sequentially connected, and heated and pressurized air enters the air cylinder through the air inlet.
As a further preferred mode, the temperature control system comprises a cooling device and a heating device, the cooling device comprises a water pump, a constant temperature water tank and a water channel, the water pump sends cooling water in the constant temperature water tank into the water channel, and the cooling water arranged in the water channel outside the cylinder sleeve reduces the temperature of the wall surface of the cylinder sleeve through heat exchange; the heating device comprises an annular constant-temperature heating pipe sleeve, and the wall surface temperature of the cylinder sleeve is improved through heating.
Preferably, the lubricating oil supply system comprises a gear oil pump, a flow valve, an oil distribution module, a constant temperature oil tank and an oil nozzle, wherein the gear oil pump pumps lubricating oil from the constant temperature oil tank, the lubricating oil is distributed to the oil nozzle through the oil distribution module, and the flow valve measures and controls the injection flow of the lubricating oil.
Preferably, the film thickness measuring system comprises a signal generator, a signal amplifier, an ultrasonic probe and a signal receiver, wherein the signal generator transmits a signal, the signal is amplified by the signal amplifier and then enters the ultrasonic probe to generate ultrasonic waves, the ultrasonic waves reach the cylinder liner and generate a reflection signal, and the reflection signal is collected by the ultrasonic probe and transmitted to the signal receiver, so that the thickness of an oil film between the piston ring and the cylinder liner is obtained.
Preferably, the data acquisition system comprises an incremental type angle mark encoder, a torque sensor, a temperature sensor, a pressure sensor and a pull pressure sensor, wherein the incremental type angle mark encoder is installed inside the crank-connecting rod mechanism and used for acquiring a crank angle signal so as to accurately judge a crank angle and a piston motion state; the torque sensor is connected with the transmission shaft and used for measuring the torque transmitted by the transmission shaft; the temperature sensors are respectively arranged on the wall surface of the cylinder sleeve, the inside of the cylinder and the constant-temperature oil tank of the lubricating oil supply system and are used for measuring the temperature of each part or position; the pressure sensor is arranged in the cylinder and used for measuring the pressure of gas in the cylinder; the pull pressure sensor is arranged at the bottom end of the cylinder sleeve and used for measuring the friction force of the piston ring-cylinder sleeve friction pair.
Generally, through the utility model above technical scheme who thinks compares with prior art, mainly possesses following technical advantage:
1. the utility model adopts the internal combustion engine original paper, utilizes cylinder liner, piston ring and piston to constitute piston ring-cylinder liner friction pair, drives piston and piston ring through transmission control system and crank link mechanism and carries out reciprocating motion from top to bottom, controls the pressure and temperature of gas in the cylinder through the pneumatic loading system, controls the cylinder wall temperature through the temperature control system, thereby simulate the working environment in the cylinder under the condition of not lighting a fire, and then study piston ring-cylinder liner friction wear performance, not only has higher operating mode reduction degree, and easy operation, low test cost, and test data are stable and reliable;
2. in addition, the utility model discloses a setting up transmission control system, pneumatic loading system and temperature control system, can realize the regulation and control to each test parameter, including piston reciprocating motion speed, the gaseous pressure and temperature in the jar, cylinder liner wall temperature, lubricating oil model, piston ring surface appearance etc. to explore the influence of different operating mode conditions to piston ring-cylinder liner friction wear performance;
3. and simultaneously, the utility model discloses utilize the ultrasonic wave to carry out the oil film thickness test, can carry out the multiple spot to the oil film thickness between piston ring and cylinder liner and measure, combine test parameters such as frictional force, explore piston ring-the vice characteristic of cylinder liner friction more deeply.
Drawings
Fig. 1 is a schematic structural diagram of a platform for testing frictional wear performance of a piston ring and a cylinder liner of an internal combustion engine according to a preferred embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same elements or structures, wherein:
1-crank link mechanism, 2-fixed slot bottom plate, 3-cylinder sleeve, 4-piston, 5-piston ring, 6-temperature control system, 7-data acquisition card, 8-pressure sensor, 9-air inlet, 10-air supply device, 11-air outlet, 12-lubricating oil supply system, 13-fixed slot top plate, 14-ultrasonic probe, 15-fixed screw, 16-computer, 17-signal generator, 18-signal amplifier, 19-signal receiver, 20-frequency converter, 21-three-phase asynchronous motor, 22-coupler, 23-torque sensor, 24-transmission shaft, 25-pulling pressure sensor, 26-incremental angle mark encoder, 27-body support, 28-gantry base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the utility model provides an internal-combustion engine piston ring-cylinder liner friction and wear performance test platform, this platform include test bench main part, test bench base, transmission control system, pneumatic loading system, temperature control system 6, lubricated oil feeding system 12, thick measurement system and data acquisition system, wherein:
the main body of the test bed is an engine original and comprises a cylinder sleeve 3, a piston 4, a piston ring 5 and a crank connecting rod mechanism 1, wherein the piston ring 5 and the piston 4 are installed in the cylinder sleeve 3 in a matching way to form a piston ring-cylinder sleeve friction pair, and the crank connecting rod mechanism 1 is connected with the piston 4 to drive the piston 4 and the piston ring 5 to reciprocate;
the test bed base is used for mounting and supporting the test bed main body, and simultaneously forms a closed cylinder together with the cylinder sleeve 3, the piston ring 5 and the piston 4, so that the vibration effect of the test bed in the running process is weakened;
the transmission control system is connected with the crank connecting rod mechanism 1 and provides power for the reciprocating motion of the piston 4 and the piston ring 5;
the pneumatic loading system is used for controlling the pressure and the temperature of gas in the cylinder, so that the actual working environment is simulated by applying loads to the piston 4 and the piston ring 5;
the temperature control system 6 is arranged outside the cylinder sleeve 3 and used for controlling the wall surface temperature of the cylinder sleeve 3 and keeping the wall surface temperature constant;
the lubricating oil supply system 12 is used for lubricating the piston ring-cylinder sleeve friction pair and the crank connecting rod mechanism by spraying lubricating oil;
the film thickness measuring system is arranged on the outer side of the cylinder sleeve 3, and the thickness of an oil film between the piston ring 5 and the cylinder sleeve 3 is tested by utilizing ultrasonic waves;
the data acquisition system is used for measuring the rotating speed, the temperature, the pressure and the like of the test bed, so that the working data of the piston ring-cylinder sleeve friction pair are obtained.
Further, the test bench base includes rack base 28, organism support 27, fixed slot bottom plate 2 and fixed slot roof 13 that follow vertical direction from the bottom up and arrange in proper order, wherein fixed slot bottom plate 2 and fixed slot roof 13 pass through clamping screw 15 and connect, 3 fixed mounting of cylinder liner are in between fixed slot bottom plate 2 and the fixed slot roof 13, still can guarantee through setting up cylinder liner stop device that the in-process cylinder liner 3 does not take place lateral shifting to do not disturb the measurement of frictional force, according to the different internal diameters that change anchor clamps of 3 diameters of cylinder liner.
Further, the transmission control system comprises a three-phase asynchronous motor 21, a coupler 22, a transmission shaft 24 and a frequency converter 20, wherein the three-phase asynchronous motor 21 is used as a power source and is connected with the crank connecting rod mechanism 1 sequentially through the coupler 22 and the transmission shaft 24 so as to drive the piston 4 and the piston ring 5 to reciprocate, and the frequency converter 20 is connected with the three-phase asynchronous motor 21 and is used for changing the rotating speed of the three-phase asynchronous motor 21.
Further, pneumatic loading system includes air inlet 9, gas vent 11 and air feeder 10, and air inlet 9 and gas vent 11 set up respectively on fixed draw-in groove roof 13, and air feeder 10 is including the compressed gas bottle, pressure boost module and the heating module that connect gradually, and the gas that adds the heat and pressure passes through air inlet 9 and gets into in the cylinder to guarantee that the gas is in under the temperature and the pressure of settlement in the cylinder.
Further, the temperature control system comprises a cooling device and a heating device, the cooling device comprises a water pump, a constant temperature water tank and a water channel, the water pump sends cooling water in the constant temperature water tank into the water channel, and the cooling water arranged in the water channel outside the cylinder sleeve 3 reduces the wall surface temperature of the cylinder sleeve 3 through heat exchange; the heating device includes an annular constant-temperature heating jacket that increases the wall temperature of the cylinder liner 3 by heating.
Further, lubricated oil feeding system 12 includes gear oil pump, flow valve, branch oily module, constant temperature oil tank and fuel sprayer, the gear oil pump is followed lubricating oil is taken out in the constant temperature oil tank, lubricating oil process divide oily module reposition of redundant personnel to the fuel sprayer, and by the flow valve measures and controls the injection flow of lubricating oil.
Further, the film thickness measuring system comprises a signal generator 17, a signal amplifier 18, an ultrasonic probe 14 and a signal receiver 19, wherein the signal generator 17 emits a signal, the signal is amplified by the signal amplifier 18 and then enters the ultrasonic probe 14 to generate ultrasonic waves, the ultrasonic waves reach the cylinder liner 3 and generate a reflection signal, and the reflection signal is collected by the ultrasonic probe 14 and transmitted to the signal receiver 19, so that the thickness of an oil film between the piston ring and the cylinder liner is obtained.
Further, the data acquisition system comprises an incremental type angle mark encoder 26, a torque sensor 23, a temperature sensor, a pressure sensor 8 and a pull pressure sensor 25, wherein the incremental type angle mark encoder 26 is installed inside the crank link mechanism 1 and used for acquiring a crank angle signal so as to accurately judge a crank angle and a piston motion state; the torque sensor 23 is connected with the transmission shaft 24 and is used for measuring the torque transmitted by the transmission shaft 24; the temperature sensors are respectively arranged on the wall surface of the cylinder sleeve 3, the inside of the cylinder and the constant-temperature oil tank of the lubricating oil supply system 12 and are used for measuring the temperature of each part or position; the pressure sensor 8 is arranged in the cylinder and used for measuring the pressure of gas in the cylinder; the pull pressure sensor 25 is arranged at the bottom end of the cylinder sleeve 3 and used for measuring the friction force of a piston ring-cylinder sleeve friction pair.
According to the utility model discloses a preferred embodiment, the utility model discloses based on LabView software established collection system control, signal collection and monitoring, data analysis and functions in windowed control and analysis software of an organic whole such as storage, the signal that the collection system obtained is gathered by data acquisition card 7 to store in computer 16, realize control, the collection and the analysis of test data to whole test bench operating condition through this software, the test bench has established promptly and has opened the stop mechanism simultaneously, has set up manual button.
Utilize the utility model provides an internal-combustion engine piston ring-cylinder liner friction and wear performance test platform carries out the concrete step that tests and is:
(a) selecting a cylinder sleeve 3, a piston 4, a piston ring 5 and a crank connecting rod mechanism 1 to be tested, and assembling;
(b) determining test working condition parameters including rotating speed, gas pressure and temperature in the cylinder, temperature of the cylinder sleeve 3, type of lubricating oil, temperature of the lubricating oil and oil injection quantity, and preheating by using a heating device according to the set temperature;
(c) zeroing each monitoring parameter time, starting the three-phase asynchronous motor 21, checking whether the assembly component operates stably at a low rotating speed, if the assembly component is unstable, stopping the machine, disassembling and reassembling the assembly component, and if the assembly component is stable, increasing the rotating speed to test the friction and wear performance;
(d) acquiring and storing signals of each sensor in real time, wherein the signals comprise a crank angle, transmission shaft torque, cylinder sleeve wall surface temperature, gas pressure and temperature in a cylinder, oil injection quantity, friction force and the like;
(e) starting a signal generator 17, and exciting an ultrasonic probe 14 to emit ultrasonic waves to measure the thickness of an oil film in the cylinder sleeve 3 so as to measure the thickness of the oil film of a piston ring-cylinder sleeve friction pair at different moments;
(f) disassembling the piston ring 5, weighing and measuring the abrasion loss after cleaning, scraping lubricating oil on the inner wall of the cylinder sleeve 3 for component analysis, comparing the component analysis with oil in a lubricating oil tank, probing the lubricating oil into the cylinder by using a micro optical microscope, and observing the abrasion condition of the inner wall of the cylinder sleeve 3;
(g) and (e) if other working condition tests are needed, repeating the steps (a) to (f) and adjusting according to needs.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides an internal-combustion engine piston ring-cylinder liner frictional wear performance test platform which characterized in that, includes test bench main part, test bench base, transmission control system, pneumatic loading system, temperature control system (6), lubricated oil feeding system (12), thick measurement system of membrane and data acquisition system, wherein:
the test bed main body is an engine original and comprises a cylinder sleeve (3), a piston (4), a piston ring (5) and a crank connecting rod mechanism (1), wherein the piston ring (5) and the piston (4) are installed in the cylinder sleeve (3) in a matching mode to form a piston ring-cylinder sleeve friction pair, and the crank connecting rod mechanism (1) is connected with the piston (4) to drive the piston (4) and the piston ring (5) to reciprocate;
the test bed base is used for mounting and supporting the test bed main body, and simultaneously forms a closed cylinder together with the cylinder sleeve (3), the piston ring (5) and the piston (4);
the transmission control system is connected with the crank connecting rod mechanism (1) and provides power for the reciprocating motion of the piston (4) and the piston ring (5);
the pneumatic loading system is used for controlling the pressure and the temperature of gas in the cylinder, so that the actual working environment is simulated by applying loads to the piston (4) and the piston ring (5);
the temperature control system (6) is arranged outside the cylinder sleeve (3) and is used for controlling the wall surface temperature of the cylinder sleeve (3) and keeping the wall surface temperature constant;
the lubricating oil supply system (12) is used for lubricating the piston ring-cylinder sleeve friction pair and the crank connecting rod mechanism (1) by spraying lubricating oil;
the film thickness measuring system is arranged on the outer side of the cylinder sleeve (3), and the thickness of an oil film between the piston ring (5) and the cylinder sleeve (3) is tested by utilizing an ultrasonic measuring principle;
the data acquisition system is used for measuring the rotating speed, the temperature and the pressure of the test bed, so that the working data of the piston ring-cylinder sleeve friction pair are obtained.
2. The test platform for testing the frictional wear performance of the piston ring and the cylinder sleeve of the internal combustion engine as claimed in claim 1, wherein the test bed base comprises a bed base (28), a machine body support (27), a fixed clamping groove bottom plate (2) and a fixed clamping groove top plate (13) which are connected in sequence, wherein the fixed clamping groove bottom plate (2) and the fixed clamping groove top plate (13) are connected through a fixing screw (15), and the cylinder sleeve (3) is fixedly installed between the fixed clamping groove bottom plate (2) and the fixed clamping groove top plate (13).
3. The test platform for the friction wear performance of the piston ring and the cylinder sleeve of the internal combustion engine as claimed in claim 2, wherein the transmission control system comprises a three-phase asynchronous motor (21), a coupler (22), a transmission shaft (24) and a frequency converter (20), wherein the three-phase asynchronous motor (21) is connected with the crank-link mechanism (1) as a power source through the coupler (22) and the transmission shaft (24) in sequence so as to drive the piston (4) and the piston ring (5) to reciprocate, and the frequency converter (20) is connected with the three-phase asynchronous motor (21) and is used for changing the rotating speed of the three-phase asynchronous motor (21).
4. The platform for testing the frictional wear performance of the piston ring and the cylinder sleeve of the internal combustion engine as claimed in claim 3, wherein the pneumatic loading system comprises an air inlet (9), an air outlet (11) and an air supply device (10), the air inlet (9) and the air outlet (11) are respectively arranged on the fixed clamping groove top plate (13), the air supply device (10) comprises a compressed air cylinder, a pressurization module and a heating module which are sequentially connected, and heated and pressurized air enters the air cylinder through the air inlet (9).
5. The test platform for the frictional wear performance of the piston ring and the cylinder sleeve of the internal combustion engine as set forth in claim 4, characterized in that the temperature control system comprises a cooling device and a heating device, the cooling device comprises a water pump, a thermostatic water tank and a water channel, the water pump sends cooling water in the thermostatic water tank into the water channel, and the cooling water arranged in the water channel outside the cylinder sleeve (3) reduces the temperature of the wall surface of the cylinder sleeve (3) through heat exchange; the heating device comprises an annular constant-temperature heating pipe sleeve, and the wall surface temperature of the cylinder sleeve (3) is increased through heating.
6. The platform for testing frictional wear performance of piston ring-cylinder liner of internal combustion engine as set forth in claim 5, characterized in that said lubricating oil supply system (12) comprises a gear oil pump, a flow valve, an oil distribution module, a constant temperature oil tank and an oil spray nozzle, said gear oil pump pumps lubricating oil from said constant temperature oil tank, lubricating oil is distributed to said oil spray nozzle through said oil distribution module, and the injection flow of lubricating oil is measured and controlled by said flow valve.
7. The internal combustion engine piston ring-cylinder liner friction wear performance test platform of claim 6, characterized in that, the film thickness measurement system comprises a signal generator (17), a signal amplifier (18), an ultrasonic probe (14) and a signal receiver (19), the signal generator (17) transmits a signal, the signal is amplified by the signal amplifier (18) and enters the ultrasonic probe (14) to generate ultrasonic waves, the ultrasonic waves reach the cylinder liner (3) and generate a reflection signal, and the reflection signal is collected by the ultrasonic probe (14) and transmitted to the signal receiver (19), so as to obtain the oil film thickness between the piston ring (5) and the cylinder liner (3).
8. The test platform for the friction wear performance of the piston ring and the cylinder sleeve of the internal combustion engine as claimed in claim 7, wherein the data acquisition system comprises an incremental type angle mark encoder (26), a torque sensor (23), a temperature sensor, a pressure sensor (8) and a pull pressure sensor (25), wherein the incremental type angle mark encoder (26) is installed inside the crank-connecting rod mechanism (1) and is used for acquiring a crank angle signal so as to accurately judge a crank angle and a piston motion state; the torque sensor (23) is connected with the transmission shaft (24) and is used for measuring the torque transmitted by the transmission shaft (24); the temperature sensors are respectively arranged on the wall surface of the cylinder sleeve (3), the inside of the cylinder and the constant-temperature oil tank of the lubricating oil supply system (12) and are used for measuring the temperature of each part or position; the pressure sensor (8) is arranged inside the cylinder and used for measuring the pressure of gas in the cylinder; the pull pressure sensor (25) is arranged at the bottom end of the cylinder sleeve (3) and used for measuring the friction force of the piston ring-cylinder sleeve friction pair.
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| CN111638151A (en) * | 2020-07-15 | 2020-09-08 | 一汽解放汽车有限公司 | Test method for detecting abrasion resistance of friction pair |
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| CN111638151A (en) * | 2020-07-15 | 2020-09-08 | 一汽解放汽车有限公司 | Test method for detecting abrasion resistance of friction pair |
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| CN113776713A (en) * | 2021-09-06 | 2021-12-10 | 滨州学院 | Method for testing friction force of piston skirt in real time in engine running process |
| CN114235611A (en) * | 2021-11-12 | 2022-03-25 | 东风商用车有限公司 | Engine friction wear test platform |
| CN114235612A (en) * | 2021-11-12 | 2022-03-25 | 东风商用车有限公司 | Cylinder sleeve-piston ring friction wear test platform |
| CN114441346A (en) * | 2021-12-24 | 2022-05-06 | 中国北方发动机研究所(天津) | Dynamic heat engine load impact test device based on rapid compressor |
| CN114544182A (en) * | 2022-01-28 | 2022-05-27 | 北京理工大学 | Reliability detection device and method for engine piston remote measurement system |
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